Oven temperature: 400-degrees. Butter or spray with pan release a 9-inch pan (for easier removal of cake line the bottom of pan with parchment paper , spray the parchment with pan release)then dust with granulated sugar set aside. In a heavy saucepan, over medium heat, melt 4 oz. chocolate (3/4 cup if using chocolate chips) and ½ cup butter stirring constantly. Remove from heat. In a large bowl combine cake flour, sugar and eggs. Mix together until well blended. With mixer on high speed pour in the chocolate mixture. Continue beating on high for 5 minutes until batter is light in color. Scrape down sides of bowl often. Pour batter into prepared pan. Bake for 15-20 minutes or until a toothpick inserted comes out clean. Allow to cool 10 minutes. Loosen sides with a knife. Invert onto cooling rack over a sheet of waxed paper. Allow to cool.

In a saucepan, boil whipping cream 1 minute, stirring. Remove from heat. Stir in remaining chocolate and butter. Leaving the cake on the cooling rack spread the ganuche over the top of cake spreading it to the edges and allow to it to drape over the sides (or spread it evenly on the sides if you don’t like the drape look). Allow chocolate to set 30 minutes. Using a spatula place cake on a serving plate.